1091973 has 8 divisors (see below), whose sum is σ = 1464736. Its totient is φ = 723600.

The previous prime is 1091957. The next prime is 1091983. The reversal of 1091973 is 3791901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1091973 - 2⁴ = 1091957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1091973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463 + ... + 1548.

It is an arithmetic number, because the mean of its divisors is an integer number (183092).

2^1091973 is an apocalyptic number.

It is an amenable number.

1091973 is a deficient number, since it is larger than the sum of its proper divisors (372763).

1091973 is a wasteful number, since it uses less digits than its factorization.

1091973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195.

The product of its (nonzero) digits is 1701, while the sum is 30.

The square root of 1091973 is about 1044.9751193210. The cubic root of 1091973 is about 102.9763039718.

The spelling of 1091973 in words is "one million, ninety-one thousand, nine hundred seventy-three".